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The following images are from here, some of which are in the public domain by pure age (I think).

Note however: [1] which says they're {{noncommercial}}

As of 2005-06-13 all articles in this list have images, except for (1) non-existent articles; and (2) articles for which the image may be new enough to attract copyright protection, e.g. Carl David Anderson. These articles are marked with a dagger †.

Contents: Top - 0–9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A

• Frederick Augustus Abel (1826–1902) — Chemistry — [2]
• John Abernethy (1764–1831) — Medicine — [3]
• Franz Carl Achard (1753–1821) — Chemistry; Physics — [4]
• Walter Sydney Adams (1876–1956) — Astronomy — [5] †
• Louis Agassiz (1807–1873) — Geology; Biology — [6] [7] [8]
• Henri Francois d'Aguesseau (1668–1751) — Jurist — [9]
• George Biddell Airy (1801–1892) — Astronomy — [10] [11] [12]
• Bernard Siegfried Albinus (1697–1770) — Biology — [13]
• Jean le Rond d'Alembert (1717–1783) — Physics; Mathematics — [14] [15] [16]
• Thomas Allen (1542–1632) — Mathematics — [17]
• André-Marie Ampère (1775–1836) — Mathematics; Chemistry; Physics — [18] [19] [20] [21] [22]
• Carl David Anderson (1905–1991) — Physics — [23] †
• John Anderson (1833–1900) — Geology; Biology — [24]
• Henry Andrews (1743–1820) — Astronomy — [25] †
• Peter Apian (1495–1552) — Astronomy; Geology — [26]
• François Arago (1786–1853) — Physics; Astronomy — [27] [28] [29] [30] [31] [32] [33] [34]
• Jean d'Arcet (1725–1801) — Chemistry; Geology; Medicine — [35] †
• Richard Arkwright (1732–1792) — Engineering — [36] [37] [38] [39]
• Svante Arrhenius (1859–1927) — Chemistry; Physics — [40]
• Francis William Aston (1877–1945) — Chemistry; Physics — [41] †

B

• Charles Babbage (1791–1871) — Mathematics — [42]
• Francis Bacon (1561–1626) — Physics — [43] [44] [45]
• Adolf von Baeyer (1835–1917) — Chemistry — [46]
• Jean Sylvain Bailly (1763–1793) — Astronomy — [47] [48] [49] [50] [51] [52]
• Joseph Banks (1743–1820) — Botany — [53] [54]
• Jean Philippe Baratier (1721–1740) — Mathematics — [55]
• John Barclay (1758–1826) — Biology — [56]
• Peter Barlow (1776–1862) — Mathematics; Physics — [57]
• Jacques Barrelier (1606–1673) — Biology — [58] †
• François de Barrême (1640–1703) — Mathematics — [59] †
• Isaac Barrow (1630–1677) — Mathematics — [60]
• Alexandre Edmond Becquerel (1820–1891) — Physics — [61]
• Antoine-Henri Becquerel (1852–1908) — Physics — [62]
• Alexander Graham Bell (1847–1922) — Engineering — [63]
• Charles Bell (1774–1842) — Biology — [64]
• Jacob Bell (1810–1859) — Chemistry — [65] †
• Johann Friedrich Benzenberg (1777–1846) — Astronomy; Geology; Physics — [66] †
• Torbern Bergman (1735–1784) — Chemistry; Geology; Biology — [67]
• Claude Bernard (1813–1878) — Biology — [68]
• Daniel Bernoulli (1700–1782) — Biology; Mathematics; Physics — [69]
• Jean Bernoulli (1667–1748) — Mathematics — [70] [71] [72] [73] [74]
• Pierre Eugène Marcellin Berthelot (1827–1905) — Chemistry — [75]
• Claude Louis Berthollet (1748–1822) — Chemistry — [76] [77] [78]
• Jons Jakob Berzelius (1779–1848) — Chemistry — [79] [80] [81] [82]
• Henry Bessemer (1813–1898) — Engineering — [83] [84]
• Erastus Brigham Bigelow (1814–1879) — Industrialist; Science Patron — [85]
• Nicolas Bion (1652–1733) — Engineering — [86] †
• Jean-Baptiste Biot (1774–1862) — Physics — [87]
• Joseph Black (1728–1799) — Chemistry; Physics; Medicine — [88] [89] [90]
• Clarence John Blake (1843–1919) — Medicine — [91] †
• Marcus Eliesar Bloch (1723–1799) — Medicine; Biology — [92]
• Johann Elert Bode (1747–1826) — Astronomy — [93]
• Hermann Boerhaave (1668–1738) — Biology; Chemistry — [94] [95] [96] [97]
• Niels Henrik David Bohr (1885–1962) — Physics — [98]
• Ludwig Boltzmann (1844–1906) — Physics — [99]
• Bernard Bolzano (1781–1848) — Mathematics — [100]
• John Booker (1603–1667) — Astrology — [101] †
• Max Born (1882–1970) — Physics — [102]
• Charles Bossut (1730–1814) — Mathematics; Technology; Engineering — [103]
• John Bostock (1773–1846) — Chemistry — [104] †
• Johann Friedrich Böttger (1682–1719) — Chemistry — [105]
• Ismael Boulliau (1605–1694) — Astronomy; Mathematics — [106] [107] †
• Matthew Boulton (1728–1809) — Engineering — [108]
• Alexis Bouvard (1767–1843) — Astronomy — [109]
• Nathaniel Bowditch (1773–1838) — Astronomy — [110]
• Robert Boyle (1627–1691) — Chemistry; Physics — [111] [112] [113] [114] [115] [116] [117] [118] [119] [120] [121] [122]
• James Bradley (1693–1762) — Astronomy — [123] [124]
• Tycho Brahe (1546–1601) — Astronomy — [125] [126] [127] [128] [129] [130]
• William Thomas Brande (1788–1866) — Chemistry — [131] [132]
• Edouard Branly (1844–1940) — Physics — [133] †
• David Brewster (1781–1868) — Optics — [134] [135] [136] [137] [138] [139]
• James Brindley (1716–1772) — Engineering — [140]
• John Brinkley (1763–1835) — Astronomy; Mathematics — [141]
• Selig Brodetsky (1888–1954) — Mathematics — [142] †
• Benjamin Brodie (1783–1862) — Biology — [143]
• Louis-César-Victor-Maurice de Broglie (1875–1960) — Physics — [144] †
• Alexandre Brongniart (1770–1847) — Geology — [145] †
• John Charles Brooke (1748–1794) — Archaeology — [146] †
• Joshua Brookes (1761–1833) — Biology — [147] †
• John Brown (1819–1822) — Biology — [148]
• Thomas Brown (1778–1820) — Physics; Biology — [149]
• Franz Ernest Brückmann (1697–1753) — Medicine — [150] †
• Marc Brunel (1769–1849) — Engineering — [151] [152]
• William Buchan (1729–1805) — Medicine — [153] †
• Ludwig Friedrich Karl Christian Buechner (1824–1899) — Biology — [154]
• Christian Wilhem Buettner (1716–1801) — Biology — [155] †
• Georges Louis Leclerc Buffon (1707–1788) — Biology — [156] [157]
• Robert Bunsen (1811–1899) — Chemistry — [158] [159]
• Jean Charles Burckhardt (1773–1825) — Astronomy; Mathematics — [160] [161] †
• Ogier Ghislain de Busbeck (1522–1592) — Biology — [162] †
• Friedrich Büthner (1622–1701) — Mathematics — [163] †
• William Butler (1535–1618) — Medicine — [164]

C

• Alessandro Cagliostro (1743–1795) — Alchemy — [165]
• John Caius (1510–1573) — Medicine — [166] [167]
• Leopoldo Marco Antonio Caldani (1725–1813) — Astronomy — [168]
• Octave Callandreau (1852–1904) — Mathematics; Astronomy — [169] †
• Joachim Camerarius (1534–1598) — Medicine — [170]
• Moritz Cantor (1829–1920) — Mathematics — [171]
• Anthony Carlisle (1768–1840) — Medicine — [172] †
• Lazare Carnot (1753–1823) — Physics; Engineering; Mathematics — [173] [174]
• Francis Howard Carr (1874–1969) — Chemistry — [175] †
• Charles Carroll (1737–1832) — Politics — [176]
• Edmund Cartwright (1743–1823) — Medicine — [177]
• Giovanni Domenico Cassini (1625–1712) — Astronomy; Geodesy — [178] [179]
• Jean-Dominique Cassini (1748–1845) — Astronomy; Geodesy — [180] [181]
• Augustin Louis Cauchy (1789–1857) — Mathematics; Physics; Astronomy — [182] [183] [184] [185]
• Tiberius Cavallo (1749–1809) — Physics — [186]
• Arthur Cayley (1821–1895) — Mathematics; Astronomy — [187] [188] [189]
• Louis-Alexandre de Cessart (1719–1806) — Engineering — [190] †
• Claude Chappe (1763–1805) — Engineering — [191]
• Jean-Antoine-Claude Chaptal (1756–1832) — Chemistry — [192] [193] [194] [195] [196]
• Michel Chasles (1793–1880) — Mathematics — [197]
• Gabrielle-Émilie Le Tonnelier de Breteuil, marquise du Châtelet (1706–1749) — Physics — [198]
• Michel Eugène Chevreul (1786–1889) — Chemistry; Medicine — [199]
• Ernst Florens Friedrich Chladni (1756–1827) — Physics — [200] [201] [202]
• Robert Christison (1797–1882) — Medicine — [203] †
• Alexis Claude Clairaut (1713–1765) — Mathematics; Astronomy — [204]
• Christoph Clavius (1538–1612) — Mathematics; Astronomy — [205]
• Agnes Mary Clerke (1842–1907) — Astronomy — [206]
• Carolus Clusius (1526–1609) — Botany — [207]
• Cadwallader Colden (1688–1776) — Botany — [208]
• Peter Collinson (1694–1768) — Biology — [209]
• Christopher Columbus (1451–1506) — Exploration — [210] [211] [212]
• Jean-Antoine-Nicolas de Caritat Condorcet (1743–1794) — Mathematics — [213] [214]
• François-Alexandre-Henri Conneau (1803–1877) — Medicine — [215] †
• Hermann Conring (1606–1681) — Physics; Medicine — [216] †
• James Cook (1728–1779) — Exploration — [217] [218]
• Nicolaus Copernicus (1473–1543) — Astronomy — [219] [220] [221] [222] [223] [224] [225] [226]
• Pierre Louis Antoine Cordier (1777–1861) — Geology; Engineering — [227] †
• George Costard (1710–1782) — Astronomy — [228] †
• Adam de Craponne (1527–1576) — Engineering — [229] †
• Samuel Crompton (1753–1827) — Invention — [230]
• William Crookes (1832–1919) — Chemistry; Physics — [231] [232]
• Marie Curie (1867–1934) — Physics — [233]
• James Curley (1796–1889) — Astronomy; Mathematics — [234]
• Georges Cuvier (1769–1832) — Zoology — [235] [236] [237] [238]

D

• Louis Jacques Mandé Daguerre (1787–1851) — Photography — [239]
• John Dalton (1766–1844) — Physics; Chemistry; Meteorology — [240] [241]
• James Dwight Dana (1813–1895) — Geology — [242] [243]
• Vincenzo Dandolo (1758–1819) — Chemistry — [244] †
• Charles Robert Darwin (1809–1882) — Biology — [245]
• Erasmus Darwin (1731–1802) — Medicine; Botany; Engineering — [246] [247]
• George Howard Darwin (1845–1912) — Mathematics; Astronomy — [248]
• Louis-Jean-Marie Daubenton (1716–1800) — Medicine; Geology — [249]
• William Davis (1771–1807) — Mathematics — [250]
• Humphry Davy (1778–1829) — Chemistry — [251] [252] [253] [254] [255] [256] [257] [258] [259] [260]
• John Dee (1527–1608) — Mathematics — [261] [262]
• Jean Baptiste Joseph Delambre (1749–1822) — Astronomy; Geodesy — [263] [264]
• Edward Smith-Stanley, 14th Earl of Derby (1799–1869) — Classics — [265]
• John Theophilus Desaguliers (1683–1744) — Physics — [266] [267]
• René Descartes (1596–1650) — Physics; Mathematics — [268] [269] [270]
• René Louiche Desfontaines (1751–1833) — Botany — [271]
• Nicolas Deyeux (1745–1837) — Medicine — [272] †
• Denis Diderot (1713–1784) — Encyclopedist — [273] [274]
• Kenelm Digby (1603–1665) — Physics — [275] [276] [277] [278] [279] [280]
• Thomas Dimsdale (1712–1800) — Medicine — [281] †
• Johann Wolfgang Doebereiner (1780–1849) — Chemistry — [282] [283]
• John Dollond (1706–1761) — Physics — [284]
• Déodat de Dolomieu (1750–1801) — Geology — [285] †
• Franciscus Cornelis Donders (1818–1889) — Medicine — [286] †
• Johan Gabriel Doppelmayr (1671–1750) — Astronomy; Mathematics; Physics — [287] †
• Heinrich Wilhelm Dove (1803–1879) — Meteorology; Physics — [288] [289] †
• Paul Drude (1863–1906) — Physics — [290] †
• Johann Dryander (1500–1560) — Mathematics; Medicine — [291] †
• Robert Dudley (1574–1649) — Engineering — [292]
• Perre Louis Dulong (1785–1838) — Chemistry; Physics — [293] †
• Jean-Baptiste Dumas (1800–1884) — Chemistry — [294] [295]
• André Marie Constant Dumeril (1774–1860) — Zoology; Medicine — [296] †
• Thomas Cochrane Dundonald (1775–1860) — Military — [297] [298]
• Charles Dupin (1784–1873) — Mathematics; Economics — [299] †

E

• Arthur Stanley Eddington (1882–1944) — Astronomy — [300]
• Paul Ehrenfest (1880–1933) — Physics — [301]
• Tatjana Ehrenfest-Afanassjewa (1876–1964) — Mathematics — [302]
• Paul Ehrlich (1854–1915) — Medicine — [303]
• Albert Einstein (1879–1955) — Physics — [304] [305] [306] [307] [308] [309]
• Wilhelm Friedrich Eisenlohr (1799–1872) — Physics — [310] †
• Havelock Ellis (1859–1939) — Psychology; Biology — [311] †
• Johann Franz Encke (1791–1865) — Astronomy — [312]
• Henry Englefield (1752–1822) — Astronomy; Botany — [313] †
• Karl Oswald Victor Engler (1842–1925) — Chemistry — [314] †
• Desiderius Erasmus (1469–1536) — Humanist — [315]
• Andreas von Ettingshausen (1796–1878) — Physics; Medicine — [316] †
• Leonhard Euler (1707–1783) — Mathematics; Astronomy; Physics — [317] [318] [319] [320]
• John Evans (1680–1730) — Astrology — [321] †
• Oliver Evans (1755–1819) — Engineering — [322]
• Johann Albert Eytelwein (1764–1848) — Engineering — [323] †

F

• Guy Crescent Fagon (1638–1718) — Botany; Medicine — [324] †
• Michael Faraday (1791–1867) — Chemistry; Physics —